python爬取贴吧图片并下载

# cording = utf-8
import urllib2
import urllib
import re
import random
import time
def get_url(url):
    Agent_list = ['Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36',
    "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1",
    "Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11"]  
    ip_list = ['123.169.165.255:9999','117.69.13.64:9999','223.198.1.147:9999']    
    user_agent = random.choice(Agent_list)    
    httpproxy_handler = urllib2.ProxyHandler({'http':random.choice(ip_list)})    
    opener = urllib2.build_opener(httpproxy_handler)    
    urllib2.install_opener(opener)    
    page = urllib2.Request(url)   
    page.add_header('User-Agent',user_agent)    
    response = urllib2.urlopen(page)    
    html = response.read()    
    return html       

def down_img(html):
    reg = r'src="(http:.+?\.jpg)'  
    urlre = re.compile(reg)    
    imglist = re.findall(urlre,html)    
    for img in imglist:    
        filename = img.split("/")[-1]        
        urllib.urlretrieve(img,filename,None)        
while True:            
    url = raw_input("请输入下载图片的贴吧地址：")    
    if url == q:    
       print("运行终止！")    
       break    
    else:  
       print('开始获取网页信息...')
       get_url(url)
       print('获取网页信息成功！')
       print('开始下载图片...')
       down_img(get_url(url))
       print('图片下载完成！') 
       timesleep(3)

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